{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6SL3121-2TE21-0AA4","brand":"Siemens","brandSlug":"siemens","productSlug":"6SL3121-2TE21-0AA4","canonicalUrl":"https://aoctrl.com/siemens/6SL3121-2TE21-0AA4","factsUrl":"https://aoctrl.com/api/mcp/products/6SL3121-2TE21-0AA4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SINAMICS S120 Double Motor Module, spare part, 6SL3121-2TE21-0AA4, 600 V DC input, 400 V 3 AC output, 9 A/9 A, booksize form factor with external air cooling.","salesMarkdown":"The Siemens 6SL3121-2TE21-0AA4 is a Double Motor Module from the SINAMICS S120 booksize family, designated as a spare part for drives with external air cooling. It accepts a 600 V DC input and delivers 400 V 3 AC output at 9 A per channel (9 A/9 A), supporting optimized pulse patterns and extended Safety Integrated functions including DRIVE-CLiQ cabling. This module carries a lifecycle stage of mature, meaning it is no longer in active new-product introduction but remains available through the supply chain. The documentation is dated 21.01.2021 with Änderungen vorbehalten © Copyright Siemens 2021, indicating the design and support status are stable. The 9 A/9 A rating is per-motor-channel output at 400 V 3 AC, sized for two independent induction or synchronous servo motors up to roughly 5 kW each depending on duty cycle. The 600 V DC input rail is standard for SINAMICS S120 shared DC-link configurations, so this module integrates directly into an existing S120 booksize line-up with a common DC bus. The external air cooling requirement means the module must be mounted in a cabinet with forced airflow; it cannot rely on natural convection alone. ## Deployment Context As a booksize module, it snaps onto the S120 mounting rail in a control cabinet alongside a Smart Line Module or Active Line Module that provides the 600 V DC bus. The extended Safety Integrated functions (e.g., STO, SBC) are routed via DRIVE-CLiQ, so the drive controller must support the safety option. For a line-down spare, verify that the firmware version on the replacement matches the existing drive unit to avoid parameter incompatibility.","metaTitle":"Siemens 6SL3121-2TE21-0AA4 SINAMICS S120 Double Motor Module","metaDescription":"Siemens SINAMICS S120 Double Motor Module, 9A/9A, 400 V 3 AC output, 600 V DC input. Mature lifecycle stage; quoted to order against RFQ. Spare part for booksize drives.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drive (VFD) 600V"],"specifications":{"title":"6SL3121-2TE21-0AA4","description":"**spare part** SINAMICS S120 Double Motor Module input: 600 V DC output: 400 V 3 AC, 9 A/9 A type of construction: booksize external air cooling optimized pulse patterns and support of the extended Safety Integrated functions incl. DRIVE-CLiQ cable","lifecycle_stage":"mature","Datum: 21.01.2021":"Änderungen vorbehalten © Copyright Siemens 2021"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$902.97","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3330adee980a7331cb052eeff10184f4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=202933&mlfb=6SL3121-2TE21-0AA4"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6SL3121-2TE21-0AA4","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6SL3121-2TE21-0AA4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}